<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"/>
    <meta name="viewport"
          content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no"/>
    <meta name="format-detection" content="telephone=no, email=no"/>
    <meta name="apple-mobile-web-app-capable" content="yes"/>
    <meta name="apple-mobile-web-app-status-bar-style" content="black"/>
    <script src="../jquery-3.1.1.js"></script>
    <title>Title</title>
</head>
<body>
<ul id="list">
    <li><label><input type="checkbox" value="1"> 1.时间都去哪儿了</label></li>
    <li><label><input type="checkbox" value="2"> 2.海阔天空</label></li>
    <li><label><input type="checkbox" value="3"> 3.真的爱你</label></li>
    <li><label><input type="checkbox" value="4"> 4.不再犹豫</label></li>
    <li><label><input type="checkbox" value="5"> 5.光辉岁月</label></li>
    <li><label><input type="checkbox" value="6"> 6.喜欢妳</label></li>
</ul>
<input type="checkbox" id="all">
<input type="button" value="全选" class="btn" id="selectAll">
<input type="button" value="全不选" class="btn" id="unSelect">
<input type="button" value="反选" class="btn" id="reverse">
<input type="button" value="获得选中的所有值" class="btn" id="getValue">
</body>
<script>
    //全选或全不选
    $("#all").click(function(){
        if(this.checked){
            $("#list :checkbox").prop("checked", true);
        }else{
            $("#list :checkbox").prop("checked", false);
        }
    });
//全选
    $("#selectAll").click(function () {
        $("#list :checkbox,#all").prop("checked", true);
    });
//全不选
    $("#unSelect").click(function () {
        $("#list :checkbox,#all").prop("checked", false);
    });
//反选
    $("#reverse").click(function () {
        $("#list :checkbox").each(function () {
            $(this).prop("checked", !$(this).prop("checked"));
        });
        allchk();
    });
//获得选中的所有值
    $("#getValue").click(function(){
        var valArr = new Array;
        $("#list :checkbox[checked]").each(function(i){
            valArr[i] = $(this).val();
        });
        var vals = valArr.join(',');//转换为逗号隔开的字符串
        alert(vals);
    });

    function allchk(){
        var chknum = $("#list :checkbox").size();//选项总个数
        var chk = 0;
        $("#list :checkbox").each(function () {
            if($(this).prop("checked")==true){
                chk++;
            }
        });
        if(chknum==chk){//全选
            $("#all").prop("checked",true);
        }else{//不全选
            $("#all").prop("checked",false);
        }
    }
</script>
</html>